Crawl Error Updates:
An important aspect of SEO is monitoring for links that exist on the internet that drive to specific pages on your site that have since been changed or deleted. It is common that businesses forget to update links across business listings, PPC campaigns, or even when they launch an updated website. When Google crawls your site, it will find these incorrect connections and create 404 errors which lowers the usability and relevancy score of your site. When a search engine attempts to reach a page on your website but is unable to do so, it generates a crawl error which can hurt your overall search ranking.
While the existing iteration of Google’s Search Console lacks a robust functionality to handle 404 error reporting, they will be rolling out a new version in spring of 2019 that has optimized mapping tools to help site owners/managers find and correct errors affecting end users.